基于卫星反演降水产品的雅砻江流域水情站网优化研究

Study on Optimization of Water Regime Gauge Network in the Yalongjiang River Basin Under Rainfall Retrieval by Satellite

降水时空变化将会显著影响流域出口径流过程。水情站网是获得降水真值的一种有效方式,在西南地区,因受地形、交通、通信等条件制约,现有水情站网空间代表性不足,需要进行优化调整。以雅砻江流域为例,分析不同区间流域水情站网密度,基于CMORPH卫星反演降水产品与现有水情站网监测降水数据,分析雅砻江流域区间降水的高值区和站网分布薄弱区,得到雅砻江流域需在庆大河、霍曲、力丘河、楞古(新)—孟底沟干流左岸区域、理塘河濯桑区域、九龙河6个区域加强站网布设,以提高降水监测空间代表性。

The temporal and spatial consistency of precipitation will significantly affect the runoff that converges to the outlet of the basin.The hydrological gauge is an effective way to obtain the true value of precipitation.In Southwest region,spatial representativeness of existing hydrological gauge is insufficient due to restrict of terrain,transportation and communication,and it needs to implement optimization and adjustment.Taking the Yalongjiang River Basin as an example,the hydrological gauge network density was analyzed.Based on the CMORPH satellite inverse precipitation product and precipitation monitoring data in the existing hydrological gauge network,the high value range of interval precipitation and the weak area of the gauge distribution were analyzed.The results show that there are 6 areas,namely Qingda River,Huoqu,and Liqiu River,Lenggu(Xin)-Mengdigou main stream left bank area,Litang River Luosang area,Jiulong River need to consider prioritized gauge deployment during the project construction process and raise spatial representativeness of precipitation monitoring.